{"slug": "show-hn-i-reverse-engineered-apple-s-video-wallpapers", "title": "Show HN: I reverse engineered Apple's video wallpapers", "summary": "The author reverse-engineered Apple's video wallpaper system to create Phosphene, an open-source tool that allows custom videos to play continuously on the macOS desktop (not just the lock screen). The tool uses the WallpaperExtensionKit.framework and includes a companion app for adding videos, while intelligently managing playback based on thermal state, battery, brightness, and window occlusion. The project was initially intended for sale but was open-sourced due to strong existing competition.", "body_md": "Ever since Apple introduced their video wallpapers I wanted to be able to put custom videos there. I decided to reverse engineer and see what I can do.\nI built Phosphene to sell it, but the existing competitors were polished enough that the time it would have taken to catch up wasn't going to pay off. So I'm open-sourcing it.\nWallpaperExtensionKit.framework is what powers macOS wallpapers. It controls what’s shows in the Settings app. It took a lot of trial and error to replicate the behavior, but the result is that your custom wallpapers appear alongside everything else. I wanted to have an “add” button there too, but I couldn’t find a way to do so, so there’s a companion app that will put your video where it needs to be.\nUnlike Apple's Aerials, the video keeps playing on the desktop (not just the lock screen). The renderer drives AVSampleBufferDisplayLayer directly with PTS-offset gapless looping, and pauses or downshifts based on thermal state, battery level, brightness, and window occlusion.\nIt’s free and works well.\nComments URL: https://news.ycombinator.com/item?id=48215979\nPoints: 411\n# Comments: 103", "url": "https://wpnews.pro/news/show-hn-i-reverse-engineered-apple-s-video-wallpapers", "canonical_source": "https://github.com/kageroumado/phosphene", "published_at": "2026-05-20 23:54:06+00:00", "updated_at": "2026-05-22 12:32:57.228184+00:00", "lang": "en", "topics": ["open-source", "developer-tools", "products"], "entities": ["Apple", "Phosphene", "WallpaperExtensionKit.framework", "AVSampleBufferDisplayLayer"], "alternates": {"html": "https://wpnews.pro/news/show-hn-i-reverse-engineered-apple-s-video-wallpapers", "markdown": "https://wpnews.pro/news/show-hn-i-reverse-engineered-apple-s-video-wallpapers.md", "text": "https://wpnews.pro/news/show-hn-i-reverse-engineered-apple-s-video-wallpapers.txt", "jsonld": "https://wpnews.pro/news/show-hn-i-reverse-engineered-apple-s-video-wallpapers.jsonld"}}